Question

For a current in a long straight solenoid, N- and S-poles are
created at the two ends. Among the following statements,
the incorrect statement is
(a) the field lines inside the solenoid are in the form of
straight lines which indicates that the magnetic field is
the same at all points inside the solenoid
(b) the strong magnetic field produced inside the solenoid
can be used to magnetise a piece of magnetic material
like soft iron, when placed inside the coil
TC) the pattern of the magnetic field associated with the
solenoid is different from the pattern of the magnetic
field around a bar magnet
(d) the N-and S-poles exchange position when the direction
of current through the solenoid is reversed.
X/Science/2​

Answer 1

Answer:

There are conflicting theories regarding the original homeland and ancestry of the Gupta dynasty that ruled northern India between 4th and 6th centuries. Modern historians variously theorize that it originated in present-day Uttar Pradesh or Bengal, based on epigraphic, numismatic and literary evidence. The social group of the dynasty is also a matter of debate, with scholars variously placing them in Vaishya, Brahmana, or other categories.